Passing two major component manufacturers, the rate of good products is not good, iPhone7 is listed as out of stock.

On the eve of the release of Apple's new iPhone, the yield of the two key components was low, and the first shipments were affected. I am afraid that the iPhone 7 will be in short supply at the beginning of the sale.

Passing two major components, the product yield is not good, iPhone7 is listed as out of stock

According to the Nikkei Asia Review, due to poor component yields, affecting iPhone 7 shipments, people familiar with the matter said that while the suppliers are working hard to improve yields, if the new iPhone still shines on the iPhone 6s last year. The table is on sale, and there may be problems with the initial supply. This news echoes the report of Yuan Pu's investment analyst Jeff Pu. Jeff Pu recently said that due to the low yield of waterproof speakers and dual-lens camera modules, the iPhone production forecast for July-December this year will be 120 million. It was revised down to 114 million, and it is estimated that the output of the iPhone 7 series will be only 74 million in the second half of the year, which is 10 million less than the iPhone 6s last year.

In addition, the recent sluggish sales of Apple's iPhone is also reflected in new orders. According to industry insiders, the A10 wafer order used by the iPhone 7 is 15% lower than that of the A9 chip used in the iPhone 6s last year, and the LCD 7's LCD panel is down 20%.

Siren and Alarm

A siren is a loud noise-making device. Civil defense sirens are mounted in fixed locations and used to warn of natural disasters or attacks. Sirens are used on emergency service vehicles such as ambulances, police cars, and fire trucks. There are two general types: pneumatic and electronic.

Many fire sirens (used for calling the volunteer fire fighters) serve double duty as tornado or civil defense sirens, alerting an entire community of impending danger. Most fire sirens are either mounted on the roof of a fire station or on a pole next to the fire station. Fire sirens can also be mounted on or near government buildings, on tall structures such as water towers, as well as in systems where several sirens are distributed around a town for better sound coverage. Most fire sirens are single tone and mechanically driven by electric motors with a rotor attached to the shaft. Some newer sirens are electronically driven speakers.

Fire sirens are often called "fire whistles", "fire alarms", or "fire horns". Although there is no standard signaling of fire sirens, some utilize codes to inform firefighters of the location of the fire. Civil defense sirens also used as fire sirens often can produce an alternating "hi-lo" signal (similar to emergency vehicles in many European countries) as the fire signal, or a slow wail (typically 3x) as to not confuse the public with the standard civil defense signals of alert (steady tone) and attack (fast wavering tone). Fire sirens are often tested once a day at noon and are also called "noon sirens" or "noon whistles".

The first emergency vehicles relied on a bell. Then in the 70s, they switched to a duotone airhorn. Then in the 80s, that was overtaken by an electronic wail.

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